In most LAN environments, the router is connected to the LAN using an Ethernet or Fast Ethernet interface. The router is a host that communicates with the LAN via a hub or a switch. A straight-through cable is used to make this connection. A 10/100BaseTX router interface requires Category 5 or better, unshielded twisted-pair (UTP) regardless of the router type.

In some cases the Ethernet connection of the router is connected directly to the computer or to another router. For this type of connection, a crossover cable is required.

The correct interface must be used. If the wrong interface is connected, damage can result to the router or other networking devices. Many different types of connections use the same style of connector. For example Ethernet, ISDN BRI, Console, AUX, integrated CSU/DSU, and Token Ring interfaces use the same eight-pin connector, RJ-45, RJ-48, or RJ-49.

To help distinguish the connections on the router, Cisco uses a color code scheme to identify connector use. Figure shows some of these for a 2600 router.

Lab Activity Lab Exercise: Connecting Router LAN Interfaces This lab is to identify the Ethernet or Fast Ethernet interfaces on the router, and identify and locate the proper cables to connect the router and PC to a hub or switch.

   

Interactive Media Activity Drag and Drop: Connecting LAN Interfaces After completing this activity, the student will be able to identify the correct components and order for connecting a hub Ethernet interface to a router AUI port.

   

Web Links Installing a Network Module http://www.cisco.com/en/US/products/ hw/routers/ps259/products_installation_ guide_chapter09186a008007dffa.html